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6 Nov 2019
Phosphoric acid is a triprotic acid (Ka1 = 6.9 times 10-3 M, Ka2 = 6.2 times 10-8 M, and Ka3 = 4.8 times 10-13 M). To find the pH of a buffer composed of H2PO4-(aq) and HPO42-(aq), which pKa value would you use in the Henderson-Hasselbalch equation? pKa1 = 2.16 PKa2 = 7.21 pKa3= 12.32 Calculate the pH of a buffer solution obtained by dissolving 17.0 g of KH2PO4(s) and 30.0 g of Na2HPO4(s) in water and then diluting to 1.00 L. pH = Show transcribed image text
Phosphoric acid is a triprotic acid (Ka1 = 6.9 times 10-3 M, Ka2 = 6.2 times 10-8 M, and Ka3 = 4.8 times 10-13 M). To find the pH of a buffer composed of H2PO4-(aq) and HPO42-(aq), which pKa value would you use in the Henderson-Hasselbalch equation? pKa1 = 2.16 PKa2 = 7.21 pKa3= 12.32 Calculate the pH of a buffer solution obtained by dissolving 17.0 g of KH2PO4(s) and 30.0 g of Na2HPO4(s) in water and then diluting to 1.00 L. pH =
Show transcribed image text Sixta KovacekLv2
27 Jul 2019